Inking mechanism for printing presses



Aug. 21, 1923. 1,465,900

F. FOSTER INKING MECANISVM FOR PR-IN'I'IIIG' PRESSES Fleaeu '6, 1923 3 sheds-sheet 1 au 2 #f V W m,

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A F. FOSTER INKING MECHANISM FOR PRINTING PRESSES 3 Sheets-Sheet 2 MMX/7M),

Aug. 21, 1923. ,465.900

F. FOSTER INKING MECHANISM FOR PRINTING PRESSES Filed Feb. 6. 1923 5 Shets-Sheet 5 Patented Aug. 2l, i923.

FRANK ros'rna, or PRESTON., ENGLAND.

INKING MECHANISM FOR PRINTING PRESSES.

Application filed February 6. 1923. Serial No. 617,3S6.`

Be it known that I, FRANK Fosrnn, a subject of the King of Great Britain, residing in Preston, England, have invented certain new and useful Improvements in or Relating to Inking Mechanism for Printing Presses (for which I have filed an application in Great Britain Jan. 1G, 1922, .Serial No. 1,372), of which the following is a specification.

This invention relates to inking mechanism for printing` presses of the kind comprising an ink fountain containing a rotating roller for delivering the ink tothe ink drum or the like, and adjustable knife, scraper blade, or the like being arranged adjacent to said roller to regulate the amount of ink delivered.

To obtain uniform and eective printing, particularlyr in the case of large newspaper machines in which ink has to be supplied to a series of columns, it isessential that means should be provided for accurately adjusting the position of the knife in relation tov the fountain roller at various points, so that uniform inking of the whole series of columns is produced.

Various methods have been suggested for this purpose.

In one methodV it 'has been proposed to provide the fountain with a platform on which a series of screws are mounted so as to press on the knife at desired points, each screw being fitted with a worm wheel ada-pted to be turned from the ends of the fountain by means of a. worm carried on an adjusting rod to regulate .the pressure of the screw on the knife, thus regulating the amount of ink delivered by the fountain roller. In this arrangement, the screws have been located two vto each column, and the ends'of the adjusting rods have been numbered to correspond with said columns.

In another method a series of cam actu-` sired points by means of a series of slidably mounted plungers operated by cams or levers. The cams or levers are carried'on cross shaftsrotated by suitable mechanism Loperlable from the outer ends of the ink fountain, such as rotatable rods for example, the arrangement being such that each cam or lever may be separate on the knife at points correspondingto each ycolumn'to be inked and all the rods for operating the cross shaft-s may be arranged to be operable from one end of the fountain or they may be divided into two groups,

operable one from each 'end of the fountain. The said rods may be arranged in banks and suitably numbered, to indicate the columns or the like. to which they refer.

Thel invention is applicable to `fountains of the undershot and overshot type and to printing machines of various kinds. i

To enable the invention to be fully understood it will nowV be described by reference to the accompanying drawings in which Fig. l' is a front elevation of an end portion of an apparatus constructed according to the invention and adapted to be applied to an ink fountain,

Fig. 2 'is an end view,`and

Fig. 3 is a planl view of same.

Fig. 4 is an end view shewing the apparatus applied to a fountain ofthe overshot type and y l Fig. 5 is a plan view thereof.

Fig. 6 vis an end view shewing the apparatus applied to a fountain of the undershot type, and A Fig. 7 below.

As shewn in Figs. l to 3 the apparatus comprises a bridge piece l, in the form yof an open frame adapted to be secured on an ink fountain. the knife being indicated at 2, pressure is applied to the knife 2 by means of a series of plungers (one only being shewn), slidably mounted in sockets 4, each plunger having an enlarged head portion 5 forming an abutment for one end of a coil spring 6. Each plunger is is a 'plan view l0() thereof as seen from Y Aadapted tobe pressed against the knife by means of a cam or lever 7 (one only being shewn) bearing on the plunger head and rigidly secured on a cross shaft 8 rotatably mounted inthe bridge piece. rlfhe v shaft 8 also carries a lever 9, rigid therewith and having a collar portion 10 containing a circular block 1 1.l Y An'adjusting rod 12 rotatably mounted in one end of the apparatus and extending longitudinally of same is formed with a screw threaded porv tion 13 which passes freely through openings 14:V formed in the collar 10 and engages a screw threaded hole bored in the block 'The openings VV14 are cut away shewn at 15 in Fig. 1 and the outer end kof the rod Y '12 is squared, so that it may be rotated i by means of a key or Spanner.

yIt will be understood that the collar 10 is free to turn on Vthe block 11.

Vith the above Ydescribed construction, when the apparatus is in position on an ink fountain, as Yshewn in Fig.V e, on turning the rod 12,V theV shaft 8` will also be rotated, raising'or loweringthe cam or lever 7 according to the direction of rotation o-f rod 12 and thus regulating the` pressurev the series may be divided and some operatkedfrom one end and the remainder from the other, as will be readily understood,

Figs. e and 5 shew the apparatus applied to a fountain 1G of the overshot type, the ink roller being indicated at 17, the plungers alhbeing operated from the'same Y end of the apparatus.

v, Figs. 6, and 7, shew the apparatus applied to a fountain 18 of the undershot type, the inking roller being indicated at 19 and the knife at 20.V In this caseY also, all the plunversV are operated from the saine end of the bridge. v Y

By means of this invention, since the springs under the plungers are always Vunder compression, backlash is entirely eliminated andso very linev adjustments of pressure may be produced on all'V desired points of the knife. y f

IThe spring plungers niay be operated by mechanism other than that illustrated and coming within the scope of the appended claims. Y

Having thus described the nature of the said invention and the best means I know of carrying the samev into practical effect,

claim 1. lnking mechanism for printing presses comprising in combination, an ink trough,

roller therein, a blade mounted longitudinally of the roller, a bridge piece,v a plurality of slidable plungers mounted on the bridge piece and engaging the blade,nioiin t ed on the bridge piece, a plurality of trans-v verse shafts mounted in thebridgerp'itce,

Y actuating members on the rtransverse shafts engaging the plungers, a lever on V)each .transverse shaft, operating rods forvmoving the levers extending, longitudinally of the bridge apiece, and springs tending to move the plungers out ofengagement with vsaid blade. Y Y 'Y Y 2;Y Inking mechanism for printing presses, comprising an ink trough,` a roller in said trough, a blade mounted longitu- 'Y dinally of said roller, a bridge pieceassociated withrsaid trough, a plurality of shafts mounted transversely .of said bridffe piece,

a plurality of plungers slidably 'mountedgr in saidV bridgev piece andV engaging said an actuating member carried by each of blade, spring means tending to move saidY I plungers out if engagement with said blade,

said transverse shafts engaging one of said.

plungers, a lever fixed to each of said transverse shafts, a collar carried byeach of said levers, each of said collars having a pair of diametricallyY disposed openings.

Vacircular block mounted in each of said',

collars, each of said blocks having a diaY metrical screw-threaded passage', and'k an operating rod for each of said plungeis extending longitudinally of vsaid bridge pieceaiid having a screw-threaded end eX- tending through the openings in one of said fcollars and engaging" the screw-threads of the block carried thereby.

In testimony whereof lj have signed my naine to this specification.

FRANK rosrrini' 

